Improvement in ore-qrushers



No. 203,793. 5 Patented May14,187a.

MFETERS] FHCTO-LITNOGRAPHER, WASHINGTON, D. C.

UNITED STATES PATENT OFFICE.

I SEBASTIAN STUTZ, ou PITTSBURG, PENNSYLVANIA.

IMPROVEMENT IN ORE-'CRUSH ERS.

`Specification forming part of Letters PatentNo. 203,793, dated May 14, 187B; application filed r April 27, 1877.

To all 'whom it may concern:

Be it known that I, SEBASTIAN STUTZ, of Pittsburg, in the county of Allegheny and State of Pennsylvania, have invented certain new and useful Improvements in Goal and'Ore Crushing Machinery; and I do hereby declare the following to be a full, clear, and exact description of the same, reference being had to the accompanying drawings, forming part of this specification, in which- Figure l represents a front elevation. Figs. 2 and 3 represent end views, and Figs. 4 and 5 are enlarged detail views.

Similar letters of reference in the accompanying drawings denote the same parts.

This invention relates to improvements in crushing and pulverizing machines of the class in which the material is crushed and pulverized by being pairs of rolls.

It consists in a novel construction, combination, and arrangement of the parts, as hereinafter specifically described and claimed.

In the drawings, A A' and B B' represent two pairs of rolls, mounted in housings F F. The former or upper rolls A A' are corrugated to break the larger pieces of the material, while the lower rolls B B have smooth surfaces to still further reduce the material to the required size. j

The combination and arrangement of mechanism for revolving each pair of rolls A A' and B B' at different rates of speed, whereby a sliding movement at their points of contact is proi duced, is one of the novelties of my invention.

This I obtain by making the cog-wheels c c1 and c4 c5 xed upon the shafts of the rolls B B and A A', respectively, of different diameters.

To better explain this arrangement, suppose the cog-wheels c cr to be of, say, thirteen and seventeen inches diameter, respectively. The thirteen-inch wheel, being on the shaft of the roll B, will revolve the latter, say, eighty times per minute. It follows, therefore, that the roll B', having a seventeen-inch wheel, @jill be revolved only about sixty-one revolutions in the same time. Thus, a sliding movement is propassed between two or more of Scrapers.

' Another feature of the invention consists in the'construction and arrangement of the mechrol1'A',*in order to reduce the pieces to the most convenient size.

I will now proceed to describe the means for carrying out this part of my invention.

b bv are pillow-blocks, which inclose halfboXeS t' t', forming the bearings ofthe movable roll A, said blocks being provided on'the outside with open spaces o o, to allow of considerable play to the half-boxes. e e are screwrods, mounted in brackets 7c lo cast with the housings F F, the headed ends of said rods being let into the half-boxes, as shown in Fig. 4, and their opposite ends passed through brass nuts inserted in the brackets k k. On the rods e e are mounted worm-wheels n n, engaging with worms o o, secured to a crossshaft. The rods are provided with'feathers,

and the worm wheels with corresponding grooves, so that the rotation of the wormwheels by the worms will cause the rods to move longitudinally, and thus adjust the roll A toward or from the roll A', in order to vary the distance between Said rolls, and thus reduce the material to the desired size.

A third feature of the invention consists in the novel construction and arrangement of the spring devices for preventing accidental breakage of the parts, which might otherwise result from the passage of the unusually hard material between the rolls.

r r are boxes or sockets cast or otherwise connected withthe housingsF F. These boxes p are located in the same horizontal plane as the center of the journals, and serve to contain either steel or rubber springs, which exert their pressure upon the journals of the roll B through stems e' e', whose headed ends are let into both half-boxes t' z'. The outer ends of the stems are screw-threaded andsurrounded by flan ged pipe-boxes fn. a. Springs s s surroundthe latter, and exert their pressure on the flanges thereof, which, in turn, bear against adjusting-nuts l Z, and thus communicate the pressure through the stems to the journals of the roll B.-

kept clean, one bythe other, without the use By this means the -size of the pieces of the material to be let through the crusher can be regulated according to their gravity. This is very important in crushing impure coal mixed intimately with slate and sulphur, in order to obtain a perfect separation by the washing machinery, through which it subsequently passes.

For the purpose of preventing the material from escaping at the ends of the rolls, one roll of each pair is provided with large flanges ff and E E. The flanges E E of the upper roll A' form cam-wheels at the same time, and support the lower end of the inclined chute H.

` The rear of the latter is suspended in hinges G G. By the action of cam-wheels E E an alternating up-and-down movement is given to the lower end of the7 chute H, and thus a feeding apparatus combined, which spreads the material upon the entire length of' the rolls. By means of the endless chain C and the buckets d d the material is raised up and emptied upon the inclined chute, where it slides down to the rolls.

The sticking of the coal or ore between the ribs of the upper pair of rolls is prevented by directing a light stream of water upon the rolls. To this end, a small pipe, w, provided` with -holes of about one-fourth of an inch in size, is fixed above the rolls A A.

Motion is given to the machinery by the pulley p, fixed upon the shaft of the roll B, and is transmitted to the upper rolls A A by means of the cog-wheels o2 and c3, as shown by Fig. 2.

I claim as my inventionl. In a crushing or pulverizing machine, the combination, with the upper corrugated rolls A A', of equal diameter, the two lower rolls B B', of equal diameter, but larger than the upper rolls, of the pinions c c1 c4 c5, of unequal diameter, substantially as described, for the purpose specified. v

2. The combination of the screw-stems e e', having the nuts l Z, with the half-boxes i fi', flanged pipe-boxes n n, springs s s, and boXes or sockets r 1, substantially as described, for the purpose specified.

SEBASTIAN sT'UTZ.

Witnesses J. J. MoCoRMIoK, J. W. B. GoNNoLLY. 

